1.) What muscle did the winging of the scapula suggest to be paralysed? Why does this sign occur? The muscle that was suggested to be paralysed due to the winging of the scapula is the Serratus Anterior muscle. The Serratus Anterior muscle’s origin is situated on the external surface of the lateral surfaces of the upper 8 to 9 ribs (ribs 1 to 8) while the insertion of this muscle is located on the costal surface of the medial border of the scapula. Therefore‚ this muscle is innervated by the long
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April 2013 Muscle Growth DR. PAUL D. THOMPSON‚ a 60 year old marathon runner and chief of cardiology at Hartford Hospital‚ stood in front of a medical audience recently and began his talk with a story about himself. Hes had been lifting weights since he was 12 years old. Dr. Thompson is now a small and wiry with not a bulging muscle on him. He was speculated that he must have a genetic inability to build muscles‚ no matter how hard he works at it. But are his muscles healthy? Muscle researchers
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Stimulus-Dependent Lab A motor unit is a motor neuron and the muscle fiber it controls. A whole muscle is made up of hundreds of motor units that are handled by different motor neurons that react at different levels of stimulation. The electric shock acts as an action potential by changing the membrane permeability allowing the sodium and potassium ions to pass through. At different levels of stimulation the motor neurons stimulate a motor unit and the more stimulation the more motor units become
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According to the former New York Senator William Seward‚ the American Civil War arose as a consequence of irrepressible conflict between opposing forces. He believed that had there been a compromise between these forces then the nation could have avoided the war. The paper agrees with the senator’s views and takes the perceptive that these opposing forces and not just the failure to compromise by politicians were the origins of the war. Politicians could only have achieved so much‚ but these opposing
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Background Information Muscles in the human body can be classified into three different types- cardiac‚ smooth and skeletal muscles. The skeletal muscles are the muscles that can be controlled voluntarily‚ in things such walking and picking things up. The skeletal muscles are made up of bundles of muscle fibres (which are also known as myofibrils‚ as can be seen below). Each of the muscle fibres contain many sarcomeres‚ which is the most basic form of striated muscle tissue- they consist of two
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The White Man’s Muscles In today’s society‚ the naked white male body is found everywhere. It can be seen in print ads‚ including clothing catalogues‚ TV commercials‚ and especially in movies‚ yet the prevalence of the naked white male body is something that has only been embraced since the 1980s. Prior to the 1980s‚ half naked white males were hardly ever seen in popular film because of the negative effects it would have on male self-esteem and masculinity. People in our generation
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We have more than 600 muscles in our bodies. They pump blood throughout your body‚ and help you lift heavy things like backpacks‚ and textbooks. You could control some of your muscles‚ while others like your heart‚ have their own jobs without us thinking at all. Muscles are all made up of same material. A type of tissue like the material in a rubber band. Thousands or tens of thousands of small fibers make up all or each muscle in our body. There are different muscles‚ fibers‚ and contractions.
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Cardiac This is an involuntary muscle‚ found solely in the walls of the heart‚ as well as in the walls of the blood vessels. This sort of muscle has similarities with the skeletal muscles‚ because it is striated. Furthermore‚ it has slight similarities to the smooth muscles‚ because its contractions are not under conscious control. On the other hand this type of muscle is highly specialised. It is under the control of the autonomic nervous system‚ however‚ even without nervous imput contractions
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of the bullfrog that was removed at the hip joint through careful dissection of the muscle away from the tibo-fibula bone while leaving the it attached to the knee and heel. The muscle was consistently moistened by Ringer’s solution throughout the entire experiment. The Achilles tendon was removed at the heel of the frog. The tibiofibular bone was cut below the knee and the femur below the knee (Frog Skeletal Muscle Experiement). The baseline value of the force transducer was set to zero. This zeroing
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"seeing-doing" because your muscles seem to "know" and "remember" just what to do. What you’re learning now is speed‚ i.e. how to perform the task carefully and quickly. That’s muscle memory. Scientists call this "kinesthetic memory" or "neuro-muscular facilitation" and they speak of "sensory-motor" learning‚ since you are combining sensing input‚ i.e. what you see with your eyes‚ with motor output‚ i.e. what you do with your body. Of course‚ during the "drill-and-practice"‚ your muscles aren’t really memorizing
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